Karabiner.appのvim設定

private.xml

<?xml version="1.0"?>
<root>
  <appdef>
    <appname>ITERM2</appname>
    <equal>com.googlecode.iterm2</equal>
  </appdef>
  <appdef>
    <appname>MACVIM</appname>
    <equal>org.vim.MacVim</equal>
  </appdef>
  <list>
    <item>
      <name>Leave insert mode with EISUU for vim</name>
      <identifier>private.app_terminal_esc_with_eisuu</identifier>
      <only>TERMINAL,ITERM2,MACVIM</only>
      <autogen>--KeyToKey-- KeyCode::ESCAPE, KeyCode::ESCAPE, KeyCode::JIS_EISUU</autogen>
      <autogen>--KeyToKey-- KeyCode::C, VK_CONTROL, KeyCode::C, VK_CONTROL, KeyCode::JIS_EISUU</autogen>
      <autogen>--KeyToKey-- KeyCode::J, VK_CONTROL, KeyCode::C, VK_CONTROL, KeyCode::JIS_EISUU</autogen>
      <autogen>--KeyToKey-- KeyCode::BRACKET_LEFT, VK_CONTROL, KeyCode::BRACKET_LEFT, VK_CONTROL, KeyCode::JIS_EISUU</autogen>
    </item>
  </list>
</root>

See
http://r7kamura.hatenablog.com/entry/20110217/1297910068
http://m.designbits.jp/13091710/